There are different formulae for Doppler effect using different frames of reference in literatures.
由于所用参考系不同，因而各种文献给出了不同形式的多普勒效应表达式。
He is adamant that this is not a perpetual motion machine, and does not violate the law of conservation of momentum because different reference frames apply to the drive and the waves within it.
他坚持认为这并非永动机，也没有违反能量守恒定律，因为驱动器和里面的微波使用不同的坐标系。
Levinson's research indicates that the different choices of frames of reference in different languages can facilitate their corresponding non-linguistic cognitive patterns.
莱文森的研究表明，不同语言中对于空间参照系的选择会影响到非语言的认知模式。
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